So, to keep cost down, don't do the virtualization and don't have separate machines. No one seems to be getting my basic point. These machines have always been multi-threaded, multi-user, multi-tasking, extremely secure, robust machines. There is no need to separate them. They can manage themselves MUCH better and much more dynamically than fixed virtual machines.
AIX really is a true operating system. Its not DOS or Windows. So, to repeat my question:
Why have separate machines?